Hostname: page-component-78c5997874-8bhkd Total loading time: 0 Render date: 2024-11-09T14:50:00.343Z Has data issue: false hasContentIssue false

From A Reaction Mechanism to New PPV'S for High Performance Polymer-Leds

Published online by Cambridge University Press:  10 February 2011

H. Spreitzer
Affiliation:
COVION Organic Semiconductors GmbH, Industrial Park Höchst, G865 A, D-65926 Frankfurt am Main, Germany, [email protected]
Get access

Abstract

Poly(p-phenylene vinylene)s (PPVs) are very promising materials for optoelectronic applications, especially for displays based on polymer light emitting diodes (PLEDs). We report here our findings concerning defect structures in this materials and the influence of the discovered irregularities on an important property of the materials, i.e. the operational life in a PLED. Recent improvements, which were deviated from this findings are presented: optimized PPVs with a lower amount of defects result in a strong increase of operational lifetime.

Type
Research Article
Copyright
Copyright © Materials Research Society 2000

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES AND NOTES

[1] Burroughes, J. H., Bradley, D. D. C., Brown, A. R., Marks, R. N., Mackay, K., Friend, R. H., Burns, P. L., and Holmes, A. B., Nature 347, p. 539 (1990).Google Scholar
[2] In the GILCH procedure, 1,4-bis(halomethyl)benzenes are polymerized by the addition of a base: Gilch, H. G., Wheelwright, W. L., J. Polym. Sci., Part A: Polym Chem. 4, p. 1337 (1966).Google Scholar
[3] Spreitzer, H., Becker, H., Kluge, E., Kreuder, W., Schenk, H., Demandt, R., and Schoo, H., Adv. Mater. 10, p. 1340 (1998).Google Scholar
[4] http://www.cdtltd.co.uk/avresults.html (February 1999)Google Scholar
[5] Kraft, A., Grimsdale, A. C., Holmes, A. B., Angew. Chem. Int. Ed. 37, p. 402 (1998).Google Scholar
[6] Gelinck, G. H., Warman, J. M., and Staring, E. G. J., J. Phys. Chem. 100, p. 5485 (1996).Google Scholar
[7] 1H and 13 C NMRs were measured for all polymers. For 2a and 2d gradient-selected H,C hift correlations were carried out. Additionally a gradient-selected H,C shift correlation experiment optimized for long-range couplings was run for 2d. Details on this investigations will be presented elsewhere: Becker, H., Spreitzer, H., Ibrom, K., and Kreuder, W., Macromolecules, submitted for publication.Google Scholar
[8] Parker, I. D., Cao, Y., and Yang, C. Y., J. Appl. Phys., 85, p. 2441 (1999).Google Scholar
[9] Liedenbaum, C., presentation at the 200. WE-Heraeus-Seminar, Electroluminescence of Organic Materials: Fundamentals, Materials and Devices, 24-26 June 1998, at Physikzentrum Bad Honnef.Google Scholar